diff options
| author | Alan Stern <stern@rowland.harvard.edu> | 2006-10-30 17:07:51 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2006-12-01 14:23:30 -0800 |
| commit | 692a186c9d5f12d43cef28d40c25247dc4f302f0 (patch) | |
| tree | 8271b7930fbabfd6b6d5cc0a3b42e65ea56976d4 /drivers | |
| parent | af4f76066d0fcb215ae389b8839d7ae37ce0e28b (diff) | |
USB: expand autosuspend/autoresume API
This patch (as814) adds usb_autopm_set_interface() to the autosuspend
API. It also provides convenient wrapper routines,
usb_autopm_enable() and usb_autopm_disable(), for drivers that want
to specify directly whether autosuspend should be allowed.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/core/driver.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c index ca0e40ed2b7..204495fa6b3 100644 --- a/drivers/usb/core/driver.c +++ b/drivers/usb/core/driver.c @@ -1322,6 +1322,28 @@ int usb_autopm_get_interface(struct usb_interface *intf) } EXPORT_SYMBOL_GPL(usb_autopm_get_interface); +/** + * usb_autopm_set_interface - set a USB interface's autosuspend state + * @intf: the usb_interface whose state should be set + * + * This routine sets the autosuspend state of @intf's device according + * to @intf's usage counter, which the caller must have set previously. + * If the counter is <= 0, the device is autosuspended (if it isn't + * already suspended and if nothing else prevents the autosuspend). If + * the counter is > 0, the device is autoresumed (if it isn't already + * awake). + */ +int usb_autopm_set_interface(struct usb_interface *intf) +{ + int status; + + status = usb_autopm_do_interface(intf, 0); + // dev_dbg(&intf->dev, "%s: status %d cnt %d\n", + // __FUNCTION__, status, intf->pm_usage_cnt); + return status; +} +EXPORT_SYMBOL_GPL(usb_autopm_set_interface); + #endif /* CONFIG_USB_SUSPEND */ static int usb_suspend(struct device *dev, pm_message_t message) |